Who called from 2016215694

They have called my cell phone approximately 7 times this morning already and it's only 10:30.  Who in the world is it?

I have received over 10 calls from this number, no one responds yet they don't leave a message. How can this be stopped?

I want this company, whoever they are, to cease calling me.

BEEN GETTING THESE CALLLS FOR THREE DAYS NOW AND FINALLY SOMEONE WAS ON THE OTHER END,  SOME GUYS, I GUESS, SAYING THAT I HAD FILED FOR A FEDERAL GRANT AND HE NEEDED MY CREDIT CARD NUMBER TO PROCESS THE CHECK FOR ME.  MY HUSBAND TOOK THE CALL AND TOLD THE PERSON TO CALL ME BACK AT 5:00PM, AM WAITING NOW FOR THE CALL.

I have received over ten calls from them just today. No one is there when I answer. How do I make it stop?